Difference between Gaia DR2 parallax and the parallax determined using asteroseismic constraints coupled with APOGEE DR14 spectroscopic constraints, as a function of Gaia DR2 parallax. The asteroseismic parallax is computed either using scaling relations at face value (upper panel) or using PARAM (lower panel). Red (blue) dots denote RC (RGB) stars. The scatter in the plot is dominated by random uncertainties on Gaia DR2 parallaxes (see Khan et al. 2019, for details).